What happens when wood burns ? āĻ•āĻžāĻ  āĻœā§āĻŦāϞāĻŋāϞ⧇ āĻ•āĻŋ āĻšāϝāĻŧ ?




Easy Notes for kids



  • Burning is called Combustion : āĻœā§āĻŦāϞāĻž āĻŽāĻžāύ⧇ Combustion (ā§°āĻžāϏāĻžāϝāĻŧāύāĻŋāĻ• āĻĒā§ā§°āĻ•ā§ā§°āĻŋāϝāĻŧāĻž)

  • Wood burns with oxygen in the air : āĻ•āĻžāϠ⧇ āĻŦāĻžāϝāĻŧ⧁⧰ āĻ…āĻ•ā§āϏāĻŋāĻœā§‡āύ⧰ āϏ⧈āϤ⧇ āĻœā§āĻŦāϞ⧇

  • It gives heat and light. : āχ āϤāĻžāĻĒ āφ⧰⧁ āĻĒā§‹āĻšā§° āĻĻāĻŋāϝāĻŧ⧇

  • Wood changes into ash, smoke, and gases : āĻ•āĻžāĻ  āĻ›āĻžāχ, āϧ⧋āĻā§ąāĻž āφ⧰⧁ āϗ⧇āĻ›āϞ⧈ āĻĒā§°āĻŋāĻŦāĻ°ā§āϤāύ āĻšāϝāĻŧ

  • Gases like carbon dioxide (CO₂) come out : āĻ•āĻžā§°ā§āĻŦāύ āĻĄāĻžāχāĻ…āĻ•ā§āϏāĻžāχāĻĄ (CO₂) āĻĻ⧰⧇ āϗ⧇āĻ› āĻ“āϞāĻžāχ āϝāĻžāϝāĻŧ

  • Smoke is made of tiny particles + gases : āϧ⧋āĻā§ąāĻž = āϏ⧰⧁ āĻ•āĻŖāĻž + āϗ⧇āĻ›

  • Sometimes we hear “crack” sound when wood burns : āϕ⧇āϤāĻŋāϝāĻŧāĻžāĻŦāĻž “āϟāĻŋāĻ•ā§ āϟāĻŋāĻ•ā§” āĻļāĻŦā§āĻĻ āĻļ⧁āύāĻž āϝāĻžāϝāĻŧ


Simple Idea: Burning → Wood changes → Heat + Light + Smoke + Gas : āϏāĻšāϜ āϧāĻžā§°āĻŖāĻž: āĻœā§āĻŦāϞāĻž → āĻ•āĻžāĻ  āϏāϞāύāĻŋ āĻšāϝāĻŧ → āϤāĻžāĻĒ + āĻĒā§‹āĻšā§° + āϧ⧋āĻā§ąāĻž + āϗ⧇āĻ›


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Burning is a chemical process known as Combustion, where wood reacts with oxygen (O₂) present in the air. During this process, heat and light are produced, and the wood starts breaking down into simpler substances.


 

āĻœā§āĻŦāϞāĻž āĻāϟāĻž ā§°āĻžāϏāĻžāϝāĻŧāύāĻŋāĻ• āĻĒā§ā§°āĻ•ā§ā§°āĻŋāϝāĻŧāĻž, āϝāĻžāĻ• Combustion āĻŦ⧁āϞāĻŋ āĻ•ā§‹ā§ąāĻž āĻšāϝāĻŧ, āϝ’āϤ āĻ•āĻžāϠ⧇ āĻŦāĻžāϝāĻŧ⧁āϤ āĻĨāĻ•āĻž āĻ…āĻ•ā§āϏāĻŋāĻœā§‡āύ (O₂)ā§° āϏ⧈āϤ⧇ āĻĒā§ā§°āϤāĻŋāĻ•ā§ā§°āĻŋāϝāĻŧāĻž āϕ⧰⧇āĨ¤ āĻāχ āĻĒā§ā§°āĻ•ā§ā§°āĻŋāϝāĻŧāĻžāϤ āϤāĻžāĻĒ āφ⧰⧁ āĻĒā§‹āĻšā§° āĻ‰ā§ŽāĻĒāĻ¨ā§āύ āĻšāϝāĻŧ āφ⧰⧁ āĻ•āĻžāĻ  āϏ⧰⧁ āϏ⧰⧁ āĻĒāĻĻāĻžā§°ā§āĻĨāϞ⧈ āĻ­āĻžāĻ™āĻŋ āϝāĻžāϝāĻŧāĨ¤https://images.openai.com/static-rsc-4/mxtO7bl8uU7ht24zqT-pangO0ijnCn7N_jHtw91DAxhhFtp_j7TNVy5D904J5q5568F_G_l57Oi5wfvLkgL2kurkkNPWBtyoGoO0_WqEDwLre1vtMN_77s6I75wYKYKvand2zHK7IP3MaYWwvPMalNBtBBlJLhKWuDJLh5YQcBODpSKq3cxQcqMKaXRpKxon?purpose=fullsize


When wood burns, it releases different gases such as carbon dioxide (CO₂), water vapor (steam), and sometimes carbon monoxide (CO). These gases come out because the material is changing into new substances during burning.


āĻ•āĻžāĻ  āĻœā§āĻŦāϞāĻŋāϞ⧇ āĻ•āĻžā§°ā§āĻŦāύ āĻĄāĻžāχāĻ…āĻ•ā§āϏāĻžāχāĻĄ (CO₂), āĻĒāĻžāύ⧀⧰ āĻŦāĻžāĻˇā§āĻĒ āφ⧰⧁ āϕ⧇āϤāĻŋāϝāĻŧāĻžāĻŦāĻž āĻ•āĻžā§°ā§āĻŦāύ āĻŽāύ⧋āĻ•ā§āϏāĻžāχāĻĄ (CO) āĻĻ⧰⧇ āĻŦāĻŋāĻ­āĻŋāĻ¨ā§āύ āϗ⧇āĻ› āύāĻŋā§°ā§āĻ—āϤ āĻšāϝāĻŧāĨ¤ āĻāχāĻŦā§‹ā§° āϗ⧇āĻ› āĻ“āϞāĻžāχ āφāĻšā§‡ āĻ•āĻžā§°āĻŖ āĻœā§āĻŦāϞāĻžā§° āϏāĻŽāϝāĻŧāϤ āĻĒāĻĻāĻžā§°ā§āĻĨ āύāϤ⧁āύ āĻĒāĻĻāĻžā§°ā§āĻĨāϞ⧈ ā§°ā§‚āĻĒāĻžāĻ¨ā§āϤ⧰āĻŋāϤ āĻšāϝāĻŧāĨ¤


Along with gases, smoke is also produced. Smoke contains very tiny solid particles mixed with gases. The bad smell we feel comes from partially burned (unburnt) chemicals present in the wood.


āϗ⧇āϛ⧰ āϏ⧈āϤ⧇ āϧ⧋āĻā§ąāĻžāĻ“ āĻ‰ā§ŽāĻĒāĻ¨ā§āύ āĻšāϝāĻŧāĨ¤ āϧ⧋āĻā§ąāĻžāϤ āĻ…āϤāĻŋ āϏ⧰⧁ āĻ•āĻ āĻŋāύ āĻ•āĻŖāĻž āφ⧰⧁ āϗ⧇āĻ› āĻŽāĻŋāĻšāϞāĻŋ āĻšā§ˆ āĻĨāĻžāϕ⧇āĨ¤ āφāĻŽāĻŋ āϝāĻŋ āĻŦ⧇āϝāĻŧāĻž āĻ—āĻ¨ā§āϧ āĻ…āύ⧁āĻ­ā§ą āϕ⧰⧋āρ, āϏ⧇āϝāĻŧāĻž āĻ…āĻĒā§‚ā§°ā§āĻŖāĻ­āĻžā§ąā§‡ āĻœā§āĻŦāϞāĻž ā§°āĻžāϏāĻžāϝāĻŧāύāĻŋāĻ• āĻĒāĻĻāĻžā§°ā§āĻĨā§° āĻŦāĻžāĻŦ⧇ āĻšāϝāĻŧāĨ¤


Sometimes, we hear cracking sounds while wood burns. This happens because heat causes the air and moisture trapped inside the wood to expand. As these gases escape quickly, they produce sound and more smoke.


āϕ⧇āϤāĻŋāϝāĻŧāĻžāĻŦāĻž āĻ•āĻžāĻ  āĻœā§āĻŦāϞāĻžā§° āϏāĻŽāϝāĻŧāϤ “āϟāĻŋāĻ•ā§ āϟāĻŋāĻ•ā§” āϧ⧰āĻŖā§° āĻļāĻŦā§āĻĻ āĻļ⧁āύāĻž āϝāĻžāϝāĻŧāĨ¤ āĻāχāĻŸā§‹ āĻšāϝāĻŧ āĻ•āĻžā§°āĻŖ āϤāĻžāĻĒ⧇ āĻ•āĻžāĻ ā§° āĻ­āĻŋāϤ⧰āϤ āĻĨāĻ•āĻž āĻŦāĻžāϝāĻŧ⧁ āφ⧰⧁ āĻĒāĻžāύ⧀ āĻĢ⧁āϞāĻžāϝāĻŧāĨ¤ āĻāχ āϗ⧇āĻ›āĻŦā§‹ā§° āĻ¤ā§ŽāĻ•ā§āώāĻŖāĻžāϤ āĻ“āϞāĻžāχ āϝāĻžāĻ“āρāϤ⧇ āĻļāĻŦā§āĻĻ āφ⧰⧁ āĻ…āϧāĻŋāĻ• āϧ⧋āĻā§ąāĻž āϏ⧃āĻˇā§āϟāĻŋ āϕ⧰⧇āĨ¤


Idea (āϧāĻžā§°āĻŖāĻž)



  • Burning → material breaks → gas + smoke come out

  • āĻœā§āĻŦāϞāĻž → āĻĒāĻĻāĻžā§°ā§āĻĨ āĻ­āĻžāϙ⧇ → āϗ⧇āĻ› āφ⧰⧁ āϧ⧋āĻā§ąāĻž āĻ“āϞāĻžāχ āϝāĻžāϝāĻŧ


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MCQs (Exam Practice)


Q1. Burning is called:


A. Freezing  B. Melting   C. Combustion   D. Boiling


Ans: C (Combustion)


Q2. Wood reacts with which gas during burning ?


A. Nitrogen  B. Oxygen  C. Hydrogen   D. Helium


Ans: B (Oxygen) : āωāĻ¤ā§āϤ⧰: B (āĻ…āĻ•ā§āϏāĻŋāĻœā§‡āύ)


Q3. Which gas is produced when wood burns ?


A. Oxygen  B. Carbon dioxide  C. Nitrogen  D. Helium


Ans: B (Carbon dioxide) : āωāĻ¤ā§āϤ⧰: B (āĻ•āĻžā§°ā§āĻŦāύ āĻĄāĻžāχāĻ…āĻ•ā§āϏāĻžāχāĻĄ)


Q4. Smoke contains:


A. Only air  B. Only water  C. Tiny particles + gases  D. Only oxygen


Ans: C. Tiny particles + gases : āωāĻ¤ā§āϤ⧰: C (āϏ⧰⧁ āĻ•āĻŖāĻž + āϗ⧇āĻ›)


Q5. Why do we hear cracking sound ?


A. Cold   B. Because of water
C. Due to expanding air inside wood   D. Due to wind


Ans: C. Due to expanding air inside wood : āωāĻ¤ā§āϤ⧰: C (āĻŦāĻžāϝāĻŧ⧁ āĻĢ⧁āϞāĻžā§° āĻŦāĻžāĻŦ⧇)


Exam Ans


When wood burns, it undergoes a chemical process called combustion. Wood reacts with oxygen in the air and produces heat and light. During this process, wood breaks into simpler substances and releases gases like carbon dioxide, water vapor, and carbon monoxide. Smoke is also produced, which contains tiny particles and gases. The cracking sound is due to the expansion of air inside the wood.


āĻ•āĻžāĻ  āĻœā§āĻŦāϞāĻŋāϞ⧇ āχāϝāĻŧāĻžāĻ• combustion āĻŦ⧁āϞāĻŋ āĻ•ā§‹ā§ąāĻž ā§°āĻžāϏāĻžāϝāĻŧāύāĻŋāĻ• āĻĒā§ā§°āĻ•ā§ā§°āĻŋāϝāĻŧāĻž āϘāĻŸā§‡āĨ¤ āĻ•āĻžāϠ⧇ āĻŦāĻžāϝāĻŧ⧁⧰ āĻ…āĻ•ā§āϏāĻŋāĻœā§‡āύ⧰ āϏ⧈āϤ⧇ āĻĒā§ā§°āϤāĻŋāĻ•ā§ā§°āĻŋāϝāĻŧāĻž āϕ⧰āĻŋ āϤāĻžāĻĒ āφ⧰⧁ āĻĒā§‹āĻšā§° āĻ‰ā§ŽāĻĒāĻ¨ā§āύ āϕ⧰⧇āĨ¤ āĻāχ āĻĒā§ā§°āĻ•ā§ā§°āĻŋāϝāĻŧāĻžāϤ āĻ•āĻžāĻ  āϏ⧰⧁ āϏ⧰⧁ āĻĒāĻĻāĻžā§°ā§āĻĨāϞ⧈ āĻ­āĻžāĻ™āĻŋ āϝāĻžāϝāĻŧ āφ⧰⧁ āĻ•āĻžā§°ā§āĻŦāύ āĻĄāĻžāχāĻ…āĻ•ā§āϏāĻžāχāĻĄ, āĻĒāĻžāύ⧀⧰ āĻŦāĻžāĻˇā§āĻĒ āφ⧰⧁ āĻ•āĻžā§°ā§āĻŦāύ āĻŽāύ⧋āĻ•ā§āϏāĻžāχāĻĄ āĻĻ⧰⧇ āϗ⧇āĻ› āύāĻŋā§°ā§āĻ—āϤ āĻšāϝāĻŧāĨ¤ āϧ⧋āĻā§ąāĻžāĻ“ āĻ‰ā§ŽāĻĒāĻ¨ā§āύ āĻšāϝāĻŧ āϝ’āϤ āϏ⧰⧁ āĻ•āĻŖāĻž āφ⧰⧁ āϗ⧇āĻ› āĻĨāĻžāϕ⧇āĨ¤ āĻļāĻŦā§āĻĻāĻŸā§‹ āĻ•āĻžāĻ ā§° āĻ­āĻŋāϤ⧰⧰ āĻŦāĻžāϝāĻŧ⧁ āĻĢ⧁āϞāĻžā§° āĻŦāĻžāĻŦ⧇ āĻšāϝāĻŧāĨ¤